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Questions & Answers

Product Discontinued by Manufacturer

Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel has been discontinued by Proof Research and is no longer available. Our product experts have helped us select these available replacements below.You can also explore other items in the Gun Parts, Rifle Parts, Rifle Barrels yourself to try and find the perfect replacement for you!

Product Info for Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel

PROOF Research has designed the AR barrels with the goal of improving performance and reliability in the AR platform. The Caliber Matched Gas System (CAMGAS) results in a gas system that is tuned specifically for the cartridge and length of the barrel. The AR-15 Platform was originally designed around the 223REM and 5.56NATO cartridges and the AR-10 was designed around the 308 Win/7.62NATO round. With higher performance cartridge such as the 6.5 Creedmoor, the bore pressure remains higher further down the barrel.image

By moving the port location, Proof Research ensures that the gas system pressure is the same as what the AR platforms were originally designed around. The result is a recoil impulse that is noticeably softer, less fouling in the receiver, increased reliability of extraction, and less wear and tear on brass. This helps keep you on target and shooting while taking advantage of the latest high performance cartridges.

Features of Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel

  • Lightweight - Up to 64% lighter than traditional steel barrels of similar contour
  • Extreme Temperature Resistance - Improved heat dissipation for cooler and longer lasting barrels
  • Unprecedented Durability - Wrapped with high-strength, aerospace-grade carbon fiber impregnated with a proprietary matrix resin
  • Long-Lasting - Excellent erosion wear characteristics and corrosion resistance
  • Extreme Pressure Resistance - An optimum combination of high tensile strength along with requisite toughness to withstand extreme chamber pressures encountered during firing

Package Contents:

  • Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel

Gun Parts and Accessories

130 / 30
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Gunsmithing Tools & Accessories

115 / 15
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Gun Triggers

115 / 15
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Magazine and Accessories

120 / 20
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Gun Sights

119 / 19
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Gun Stocks

117 / 17
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Mounts, Rings and Accessories

119 / 19
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Related Products to Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel

Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel Unavailable & Discontinued Models

List of Unorderable Models

  • Proof Research Carbon AR .204 Ruger Threaded Rifle Barrel, 20 inch, Rifle Length, 1-10 Twist, 5/8-24, Carbon, 143209 , MPN: 143209 , UPC: 843068143209 , Code: 2SB-RTB-PR03RB-143209
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Last updated 2026-08-10 UTC.